"The Flavored Coffee Guy" <elgersmad@rock.com> wrote

... it continues with closed environmental systems deep in caves, 
ecosystems
that require no light, and rely completely on chemosynthesis,

Chemosynthesis relies on outside energy. Caves are definitely not an example 
of over-unity.

Usenet is not a proper place to give lessons in elementary science to those 
who did not pay attention in high school science class.